Schools are strategic sites for early intervention. The 1994 national census of homeless school students found that homeless teenagers usually have their first experience of homelessness while they are still at school (MacKenzie and Chamberlain 1995). The researchers estimated that 25,000 to 30,000 students experience a period of homelessness each year, and that most homeless students drop out of school. Since 1995, the early intervention perspective has been widely adopted around the country.